Directionality of sperm whale sonar clicks and its relation to piston radiation theory
This paper investigates the applicability to sperm whales of the theory of sound radiating from a piston. The theory is applied to a physical model and to a series of sperm whale clicks. Results show that wave forms of off-axis signals can be reproduced by convolving an on-axis signal with the spati...
| Published in: | The Journal of the Acoustical Society of America |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
2006
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| Subjects: | |
| Online Access: | https://pure.au.dk/portal/da/publications/directionality-of-sperm-whale-sonar-clicks-and-its-relation-to-piston-radiation-theory(de383fe0-dd1d-11db-bee9-02004c4f4f50).html https://doi.org/10.1121/1.2161799 |
| Summary: | This paper investigates the applicability to sperm whales of the theory of sound radiating from a piston. The theory is applied to a physical model and to a series of sperm whale clicks. Results show that wave forms of off-axis signals can be reproduced by convolving an on-axis signal with the spatial impulse response of a piston. The angle of a recorded click can be estimated as the angle producing the spatial impulse response that gives the best match with the observation when convolved with the on-axis wave form. It is concluded that piston theory applies to sperm whale sonar click emission. |
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